25840834 has 4 divisors (see below), whose sum is σ = 38761254. Its totient is φ = 12920416.

The previous prime is 25840831. The next prime is 25840847. The reversal of 25840834 is 43804852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25532809 + 308025 = 5053^2 + 555^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25840834.

It is not an unprimeable number, because it can be changed into a prime (25840831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6460207 + ... + 6460210.

Almost surely, 2^25840834 is an apocalyptic number.

25840834 is a deficient number, since it is larger than the sum of its proper divisors (12920420).

25840834 is a wasteful number, since it uses less digits than its factorization.

25840834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12920419.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 25840834 is about 5083.3880434214. The cubic root of 25840834 is about 295.6438451336.

The spelling of 25840834 in words is "twenty-five million, eight hundred forty thousand, eight hundred thirty-four".